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[英]In Javascript, when working locally, how to read file from project folder to use it as ArrayBuffer?
[英]How to read a file in project folder javascript?
我正在做一个反应项目。 我在公用文件夹中有一个视频文件。 有一种情况我必须读取文件并将其作为文件发送到服务器。我尝试了下面的代码但它没有用
const readVideo = () => {
console.log(isDev.current.checked);
fetch("/images/Sample_2.mp4").then(function (response) {
console.log(response);
const reader = new FileReader();
reader.onload = (e) => {
console.log(e.target.result);
};
reader.readAsDataURL(response.url);
});
};
这样做时我收到以下错误
Unhandled Rejection (TypeError): Failed to execute 'readAsDataURL' on 'FileReader': parameter 1 is not of type 'Blob'.
您需要将响应传输到 Blob object。
https://developer.mozilla.org/zh-CN/docs/Web/API/Body/blob
const readVideo = () => {
console.log(isDev.current.checked);
fetch('/images/Sample_2.mp4')
.then(response => {
if (!response.ok) {
throw new Error('Network response was not ok');
}
return response.blob();
})
.then(myBlob => {
console.log(myBlob);
const reader = new FileReader();
reader.onload = e => {
console.log(e.target.result);
};
reader.readAsDataURL(myBlob);
})
.catch(error => {
console.error(
'There has been a problem with your fetch operation:',
error
);
});
};
它应该工作。
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